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A radar unit is used to measure speeds of cars on a motorway. The speeds are...

A radar unit is used to measure speeds of cars on a motorway. The speeds are normally distributed with  μ = 90 km/hr and a standard deviation of σ = 9.2 km/hr. Approximately 86.21% of the population has a speed of at most 100 km/hr.

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TOPIC:Normal distribution.

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